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s. N MURGITTROYD. KHOT WATER HEATING APPARATUS. I

No. 522,226. Y Patented July 3, 1894...

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s. N. MURGITTROYD. HOT WATER HEATING APPARATUS.

Patented July '3, 1894.

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ATTORNEYS.

U ITE ST TES PATENT DEUCE;

SMITH NQMURGITTROYD, v011 PI-I NIX, NEW YoRK, ASSIGNOR To THE PHOENIX HoT WATER HEATER COMPANY, OF sAME PLACE.

-HOT-WA'TE'R HEATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 522,226, dated July 3, 1 894. Application filed June 29, 1893. Serial No. 479,135. 0 model.)

. .To all whom it may concern/.- 7 Be it known that I, SMITH N. MURGITTROYD,

My object is to produce a base-burning hotwater heater, in which the fuel magazine is surrounded by an annular water-chamber, the Wall of said magazine, or fuel conduit, forming the inner wall of said chamber, its outer wall being parallel thereto, said outer wall being provided with auxiliary water chambers connected to the water chamber and projecting outwardly into the smokechamber between said wall and the inclosing casing; in which the walls of the fire-pot consist of a series of hollow verticalwater-chambers, one or more of which are connected to the return pipe of a hot-water heating system, each of the latter chambers being connected to the main water-chamber, and, through said tubular connections connected to each other, the feed pipe leading to the heatingsystem" being connected to the upper part of the'main Water-chamber.

My invention consists in the several novel features of construction and operation hereinafter described, and which are specifically set forth in the claims hereunto annexed. 'It is constructed as follows, reference being had to the accompanying drawings, in which- Figure 1, is a front elevation of the heater part of the casing being broken away. Fig. 2, is a vertical transverse sectional elevation of the same, partly in elevation. Fig. 3, is a horizontal transverse sectional elevation of the same, substantially on line'm'c, in Fig. 2. Fig. 4, is a plan perspective ofone of the sections of the Wall of the fire-pot. Fig. 5, is alike view of one of the tubular connections between a fire-pot wall section and the main water-chamber.

A, is the base comprising the ash-pit -a-, the support for the grate or grate-bars a'-,

. the shelf Z)- and the vertical rim -b-.

Upon'the shelf b the vertical sections c of the fir'e. pot wall are placed, each section being cast hollow, closed at the bottom and having in the top an open neck c'.

B, is a tubular fuel-chamber or conduit, suspended wholly or partially from the topplate 'dwhich is supported by the casing cl'- which latter is supported by the rim b' said f uel-chamber being provided with a suitable cover e, to close the top. By means of the heads h-- and h around the fuel-chamber wall, and the vertical wall h between said heads an annular water chamber -Je is created, hereinaftertermed 4 A In suitable holes v the main water-chamber. in the wall -h the auxiliary water-chambers -mare secured, each consisting of a hollow cast body, having an open neck m'-, said necks being secured in said wall and also connecting these chambers to the main chamber. Each of these chambers -m is substantially frusto-conical in form, the large end being the outer one, and all of them projecting'into the smoke or combustion chamber n between the casing and the wall h. Each of the sections comprising the fire-pot wall, and hereinafter called the firep'ot water-chambers, is connected to the mainwater chamber by means of a tubular connection r-, provided with an open stern r,- fitting closely into the neck of each fire pot water-chamber c-- and with an open neck -r inserted into the wall h of the main water-chamber. The return pipe or pipes --sare connected to one, or more, of the fire-pot water-chambers, adjacent to their lower ends, and the feed-pipe or pipes s'- leading to the heating system are connected to the upper part of the main waterchamber. By this construction, I'produce a base-burning heater,.provided with fire-pot water-chambers, a main water-chamber, and auxiliary water-chambers, allconnected and connected to the feed and return pipes of a heating system, all of said chambers and said connections being exposed to the direct action of the fire in the fire-pot, or to the products of combustion in the combustion chamber, thereby insuring rapid heating and rapid circulation and consequently imparting great utility to the apparatus, with a very small consumption of fuel. Also, the auxiliary chambers being enlarged outwardly, thus hold a larger quantity of water, expose a larger quantity to the action of the heat, in addition to greatly increasing the heating surface.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. A heating apparatus comprising a firepot, the walls of which consist of water-chambers, a coal feeding conduit above the fire-pot, an annular main water-chamber around said conduit, tubular connections between the firepot water-chambers, auxiliary water-chambers connected to and projecting laterally from said main chamber, in combination with a fire-pot, a combustion chamber, and the feed and return pipes of a heating system connected respectively to the main water-chamher and to the fire-pot Water-chambers.

2. A heating apparatus comprising a firepot, the walls of which consist of water-chambers, a coal feeding conduit above the fire-pot,

an annular main water-chamber around said conduit, tubular connections between said fire-pot water chambers and the main waterchamber, auxiliary water chambers connected to and projecting from said main waterchamber and enlarged outwardly, in combination with a fire-pot, a combustion chamber, and the feed and return pipes of a heating system connected respectively to the main waterchamber and to thefire-pot water-chambers.

In witness whereof I have hereunto set my hand this 22d day of May, 1893.

SMITH N. MURGITTR OYD.

In presence of-- H. (J. BREED, HOWARD I. DENISON. 

